5 description => "Table z3950servers: three cols NOT NULL",
8 my ($dbh, $out) = @$args{qw(dbh out)};
10 # Preliminary data checks
11 my $sql = "SELECT COUNT(*) FROM z3950servers WHERE host IS NULL";
12 my ($cnt) = $dbh->selectrow_array($sql);
13 if( $cnt ) { # No host is really bad data! Remove it.
14 $dbh->do( "DELETE FROM z3950servers WHERE host IS NULL" );
15 say $out "Found bad data in table z3950servers: removed $cnt records with host undefined";
17 $sql = "SELECT host FROM z3950servers WHERE syntax IS NULL OR encoding IS NULL";
18 my $hosts = $dbh->selectcol_arrayref($sql);
19 if( @$hosts ) { # This is bad data too. We choose a default here.
20 $dbh->do( q|UPDATE z3950servers SET syntax = COALESCE(syntax, 'USMARC'), encoding = COALESCE(encoding, 'utf8')
21 WHERE syntax IS NULL OR encoding IS NULL| );
22 say $out "Corrected empty syntax or encoding for the following hosts. Please check after upgrade.";
23 say $out "Updated hosts: ". (join ',', @$hosts);
28 alter table z3950servers
29 change column `host` `host` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'target''s host name',
30 change column `syntax` `syntax` varchar(80) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'MARC format provided by this target',
31 change column `encoding` `encoding` mediumtext COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'characters encoding provided by this target';